Teacher's Guide - Pearson

Exercise 15.8 (Student’s Book page 283)1. (x 2 9)(x 1 9)2. (2x 2 1)(2x 1 1)3. (j 2 13y)(j 1 13y)4. (3m 2 5)(3m 1 5)5. 2(t 2 2)(t 1 2)6. 5m(m 2 3n)(m 1 3n)7. 2(6 2 x)(6 1 x)8. [5 2 (b 1 3)][5 1 (b 1 3)]5 (2 2 b)(8 1 b)9. (23 2 d)(9 2 d)10. 3(5 2 x)(5 1 x)11. (4z 2 3)(4z 1 3)12. 3ab 2 (9a 2 2 4)5 3ab 2 (3a 2 2)(3a 1 2)13. 3x 3 y 3 z(x 2 4yz 2 )(x 1 4yz 2 )Exercise 15.9 (Student’s Book page 284)1. a)_________4b 2 (1 1 2b)​ 3 ___________(b 2 1)(b 1 1)​​b 1 1b5 4b(1 1 2b)(b 2 1)b) 4(b 2 2 3)(2b 1 3)(b 2 1)c) _____________(2b 2 3)(2b 1 3) ​2 _______ ​ 3(b 2 3) ​3bb5 ​ __________2 2 8b 1 92b(2b 2 3) ​ OR _________ ​8b – b2 – 9b(2b – 3) ​2. P 5 ___________(b 1 1)(b 1 3)​1 ___________​ (b 2 2)(b 1 2)2​[ 3(b 1 1) 3(b 1 2) ] ​5 4b 1 23A 5 ___________​ (b 2 2)(b 1 2) ​ 3 ___________(b 1 3)(b 1 1)​​3(b 1 3) 3(b 1 1)5 ​ _____ b 2 2 4​9Revision Exercise (Student’s Book page 285)1. a) b 2 (b 2 1) 1 3b(b 2 1)5 b(b 2 1)(b 1 3)b) a 2 1 a 2 6c) x 3 2 3x 2 2 10xd) x 2 2 8x 1 16e) 4a 2 1 12ab 1 9b 294 EXPLORING MATHEMATICS FORM 3